Fix CodeGenerator exception for types without parameterless ctor (#573)

Add tests to generate code for all examples in example library.
A null exception on ScatterSeries is also fixed.

CHANGELOG.md

@@ -89,6 +89,7 @@ All notable changes to this project will be documented in this file.
 - This PlotModel is already in use by some other PlotView control (#497)
 - LegendTextColor not synchronized between wpf.Plot and InternalModel (#548)
 - Legend in CandleStickSeries does not scale correctly (#554)
+- Fix CodeGenerator exception for types without parameterless ctor (#573)
 
 ## [2014.1.546] - 2014-10-22
 ### Added

Source/OxyPlot.AppVeyor.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
-VisualStudioVersion = 12.0.31101.0
+# Visual Studio 14
+VisualStudioVersion = 14.0.23107.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OxyPlot.Wpf", "OxyPlot.Wpf\OxyPlot.Wpf.csproj", "{698CCD8E-ADCC-4565-8517-5EDD36F07155}"
 EndProject